/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:14:04,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:14:04,626 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:14:04,640 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:14:04,641 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:14:04,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:14:04,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:14:04,646 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:14:04,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:14:04,649 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:14:04,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:14:04,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:14:04,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:14:04,654 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:14:04,655 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:14:04,657 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:14:04,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:14:04,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:14:04,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:14:04,663 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:14:04,665 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:14:04,669 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:14:04,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:14:04,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:14:04,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:14:04,681 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:14:04,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:14:04,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:14:04,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:14:04,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:14:04,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:14:04,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:14:04,690 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:14:04,692 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:14:04,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:14:04,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:14:04,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:14:04,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:14:04,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:14:04,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:14:04,703 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:14:04,704 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 11:14:04,731 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:14:04,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:14:04,733 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:14:04,733 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:14:04,733 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:14:04,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:14:04,734 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:14:04,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:14:04,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:14:04,734 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:14:04,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:14:04,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:14:04,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:14:04,735 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:14:04,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:14:04,735 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:14:04,735 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:14:04,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:14:04,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:14:04,736 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:14:04,736 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:14:04,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:14:04,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:14:04,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:14:04,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:14:04,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:14:04,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:04,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:14:04,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:14:04,738 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-21 11:14:05,055 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:14:05,076 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:14:05,083 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:14:05,084 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:14:05,085 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:14:05,086 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/dll_of_dll-2.i [2020-07-21 11:14:05,189 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1685a4135/66d52f62312149a5915dd053ce3ab0cc/FLAG951b98efa [2020-07-21 11:14:05,882 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:14:05,883 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/dll_of_dll-2.i [2020-07-21 11:14:05,898 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1685a4135/66d52f62312149a5915dd053ce3ab0cc/FLAG951b98efa [2020-07-21 11:14:06,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1685a4135/66d52f62312149a5915dd053ce3ab0cc [2020-07-21 11:14:06,114 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:14:06,117 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:14:06,119 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:14:06,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:14:06,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:14:06,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:14:06" (1/1) ... [2020-07-21 11:14:06,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cca3b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:06, skipping insertion in model container [2020-07-21 11:14:06,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:14:06" (1/1) ... [2020-07-21 11:14:06,136 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:14:06,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:14:06,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:14:06,919 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:14:07,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:14:07,097 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:14:07,098 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:07 WrapperNode [2020-07-21 11:14:07,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:14:07,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:14:07,100 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:14:07,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:14:07,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:07" (1/1) ... [2020-07-21 11:14:07,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:07" (1/1) ... [2020-07-21 11:14:07,138 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:07" (1/1) ... [2020-07-21 11:14:07,139 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:07" (1/1) ... [2020-07-21 11:14:07,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:07" (1/1) ... [2020-07-21 11:14:07,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:07" (1/1) ... [2020-07-21 11:14:07,189 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:07" (1/1) ... [2020-07-21 11:14:07,198 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:14:07,199 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:14:07,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:14:07,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:14:07,201 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:14:07,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:14:07,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:14:07,271 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-07-21 11:14:07,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-21 11:14:07,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-21 11:14:07,272 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-07-21 11:14:07,272 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_slave [2020-07-21 11:14:07,272 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die_master [2020-07-21 11:14:07,272 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_slave [2020-07-21 11:14:07,272 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_generic [2020-07-21 11:14:07,273 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_slave [2020-07-21 11:14:07,273 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_slave [2020-07-21 11:14:07,273 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_nested_lists [2020-07-21 11:14:07,273 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_reinit_nested_lists [2020-07-21 11:14:07,273 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy_master [2020-07-21 11:14:07,274 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert_master [2020-07-21 11:14:07,274 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create_master [2020-07-21 11:14:07,274 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_base [2020-07-21 11:14:07,274 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_full [2020-07-21 11:14:07,276 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_dangling [2020-07-21 11:14:07,276 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_init [2020-07-21 11:14:07,276 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:14:07,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:14:07,276 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-21 11:14:07,277 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-21 11:14:07,277 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-21 11:14:07,277 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-21 11:14:07,277 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-21 11:14:07,277 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-21 11:14:07,277 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-21 11:14:07,278 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-21 11:14:07,278 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-21 11:14:07,278 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-21 11:14:07,278 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-21 11:14:07,278 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-21 11:14:07,278 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-21 11:14:07,279 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-21 11:14:07,279 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-21 11:14:07,279 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-21 11:14:07,279 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-21 11:14:07,279 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-21 11:14:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-21 11:14:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-21 11:14:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-21 11:14:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-21 11:14:07,281 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-21 11:14:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-21 11:14:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-21 11:14:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-21 11:14:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-21 11:14:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-21 11:14:07,282 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-21 11:14:07,283 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-21 11:14:07,283 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-21 11:14:07,283 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-21 11:14:07,283 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-21 11:14:07,283 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-21 11:14:07,283 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-21 11:14:07,283 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-21 11:14:07,283 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-21 11:14:07,283 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-21 11:14:07,284 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-21 11:14:07,284 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-21 11:14:07,284 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-21 11:14:07,284 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-21 11:14:07,284 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-21 11:14:07,285 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-21 11:14:07,285 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-21 11:14:07,285 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-21 11:14:07,285 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-21 11:14:07,285 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-21 11:14:07,285 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-21 11:14:07,285 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-21 11:14:07,286 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-21 11:14:07,286 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-21 11:14:07,286 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 11:14:07,286 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-21 11:14:07,286 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-21 11:14:07,287 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 11:14:07,287 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-21 11:14:07,287 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-21 11:14:07,287 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-21 11:14:07,287 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-21 11:14:07,287 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-07-21 11:14:07,288 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:14:07,288 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-21 11:14:07,288 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-07-21 11:14:07,288 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-21 11:14:07,288 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-21 11:14:07,288 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-07-21 11:14:07,289 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-21 11:14:07,289 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-21 11:14:07,289 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-21 11:14:07,289 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-21 11:14:07,289 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-21 11:14:07,289 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-21 11:14:07,289 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-21 11:14:07,290 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-21 11:14:07,290 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-21 11:14:07,290 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-21 11:14:07,290 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-21 11:14:07,290 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-21 11:14:07,290 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-21 11:14:07,290 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-21 11:14:07,291 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-21 11:14:07,291 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-21 11:14:07,291 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-21 11:14:07,291 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-21 11:14:07,291 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-21 11:14:07,291 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-21 11:14:07,291 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-21 11:14:07,292 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-21 11:14:07,292 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-21 11:14:07,292 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-21 11:14:07,292 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-21 11:14:07,292 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-21 11:14:07,292 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-21 11:14:07,293 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-21 11:14:07,293 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-21 11:14:07,293 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-21 11:14:07,293 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-21 11:14:07,293 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-21 11:14:07,293 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-21 11:14:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-21 11:14:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-21 11:14:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-21 11:14:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-21 11:14:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-21 11:14:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:14:07,294 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-07-21 11:14:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_slave [2020-07-21 11:14:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 11:14:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 11:14:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die_master [2020-07-21 11:14:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_slave [2020-07-21 11:14:07,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 11:14:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_generic [2020-07-21 11:14:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 11:14:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-07-21 11:14:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-07-21 11:14:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:14:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_slave [2020-07-21 11:14:07,296 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_slave [2020-07-21 11:14:07,297 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_nested_lists [2020-07-21 11:14:07,297 INFO L130 BoogieDeclarations]: Found specification of procedure dll_reinit_nested_lists [2020-07-21 11:14:07,297 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy_master [2020-07-21 11:14:07,297 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert_master [2020-07-21 11:14:07,297 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create_master [2020-07-21 11:14:07,297 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_base [2020-07-21 11:14:07,298 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_full [2020-07-21 11:14:07,298 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_dangling [2020-07-21 11:14:07,298 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_init [2020-07-21 11:14:07,298 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:14:07,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:14:07,298 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:14:08,299 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:14:08,299 INFO L295 CfgBuilder]: Removed 38 assume(true) statements. [2020-07-21 11:14:08,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:14:08 BoogieIcfgContainer [2020-07-21 11:14:08,306 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:14:08,307 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:14:08,307 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:14:08,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:14:08,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:14:06" (1/3) ... [2020-07-21 11:14:08,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28fd67bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:14:08, skipping insertion in model container [2020-07-21 11:14:08,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:14:07" (2/3) ... [2020-07-21 11:14:08,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28fd67bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:14:08, skipping insertion in model container [2020-07-21 11:14:08,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:14:08" (3/3) ... [2020-07-21 11:14:08,316 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_of_dll-2.i [2020-07-21 11:14:08,328 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:14:08,338 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:14:08,355 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:14:08,386 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:14:08,386 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:14:08,386 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:14:08,386 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:14:08,387 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:14:08,387 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:14:08,387 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:14:08,387 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:14:08,415 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states. [2020-07-21 11:14:08,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-21 11:14:08,426 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:08,427 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:08,428 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:08,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1405399524, now seen corresponding path program 1 times [2020-07-21 11:14:08,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:08,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731254819] [2020-07-21 11:14:08,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:08,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:14:08,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-21 11:14:08,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:14:08,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731254819] [2020-07-21 11:14:08,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:14:08,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:14:08,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51762691] [2020-07-21 11:14:08,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:14:08,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:08,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:14:08,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:14:08,771 INFO L87 Difference]: Start difference. First operand 169 states. Second operand 2 states. [2020-07-21 11:14:08,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:08,835 INFO L93 Difference]: Finished difference Result 329 states and 517 transitions. [2020-07-21 11:14:08,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:14:08,837 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 59 [2020-07-21 11:14:08,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:08,857 INFO L225 Difference]: With dead ends: 329 [2020-07-21 11:14:08,857 INFO L226 Difference]: Without dead ends: 155 [2020-07-21 11:14:08,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:14:08,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-21 11:14:08,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-07-21 11:14:08,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-07-21 11:14:08,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 184 transitions. [2020-07-21 11:14:08,988 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 184 transitions. Word has length 59 [2020-07-21 11:14:08,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:08,989 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 184 transitions. [2020-07-21 11:14:08,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:14:08,989 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 184 transitions. [2020-07-21 11:14:08,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-21 11:14:08,999 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:09,001 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:09,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:09,218 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:09,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:09,220 INFO L82 PathProgramCache]: Analyzing trace with hash 747676979, now seen corresponding path program 1 times [2020-07-21 11:14:09,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:09,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886219605] [2020-07-21 11:14:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:09,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 11:14:09,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-21 11:14:09,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:14:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-07-21 11:14:09,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886219605] [2020-07-21 11:14:09,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:14:09,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-07-21 11:14:09,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353892260] [2020-07-21 11:14:09,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 11:14:09,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:09,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 11:14:09,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 11:14:09,902 INFO L87 Difference]: Start difference. First operand 155 states and 184 transitions. Second operand 6 states. [2020-07-21 11:14:10,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:10,061 INFO L93 Difference]: Finished difference Result 316 states and 390 transitions. [2020-07-21 11:14:10,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-21 11:14:10,062 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-07-21 11:14:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:10,065 INFO L225 Difference]: With dead ends: 316 [2020-07-21 11:14:10,065 INFO L226 Difference]: Without dead ends: 168 [2020-07-21 11:14:10,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-07-21 11:14:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-07-21 11:14:10,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-07-21 11:14:10,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-21 11:14:10,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 199 transitions. [2020-07-21 11:14:10,087 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 199 transitions. Word has length 60 [2020-07-21 11:14:10,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:10,087 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 199 transitions. [2020-07-21 11:14:10,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 11:14:10,088 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 199 transitions. [2020-07-21 11:14:10,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-07-21 11:14:10,090 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:10,091 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:10,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:10,304 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:10,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:10,305 INFO L82 PathProgramCache]: Analyzing trace with hash 586330229, now seen corresponding path program 1 times [2020-07-21 11:14:10,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:10,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531099844] [2020-07-21 11:14:10,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:10,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-21 11:14:10,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:10,773 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:14:10,774 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 47 [2020-07-21 11:14:10,775 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:10,847 INFO L624 ElimStorePlain]: treesize reduction 20, result has 60.8 percent of original size [2020-07-21 11:14:10,849 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:14:10,850 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:36, output treesize:8 [2020-07-21 11:14:10,896 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2020-07-21 11:14:10,897 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:10,899 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:14:10,900 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:14:10,900 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:4 [2020-07-21 11:14:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-07-21 11:14:11,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 11:14:12,225 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2020-07-21 11:14:12,228 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-21 11:14:12,293 INFO L624 ElimStorePlain]: treesize reduction 38, result has 47.2 percent of original size [2020-07-21 11:14:12,296 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-21 11:14:12,297 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:40, output treesize:7 [2020-07-21 11:14:12,310 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 174 [2020-07-21 11:14:12,312 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-21 11:14:12,437 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 25 [2020-07-21 11:14:12,441 INFO L624 ElimStorePlain]: treesize reduction 127, result has 21.6 percent of original size [2020-07-21 11:14:12,442 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 3 xjuncts. [2020-07-21 11:14:12,442 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:20 [2020-07-21 11:14:12,578 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-07-21 11:14:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2020-07-21 11:14:12,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531099844] [2020-07-21 11:14:12,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 11:14:12,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-07-21 11:14:12,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059740951] [2020-07-21 11:14:12,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 11:14:12,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:14:12,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 11:14:12,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-07-21 11:14:12,801 INFO L87 Difference]: Start difference. First operand 168 states and 199 transitions. Second operand 21 states. [2020-07-21 11:14:13,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:14:13,684 INFO L93 Difference]: Finished difference Result 299 states and 361 transitions. [2020-07-21 11:14:13,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-21 11:14:13,685 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 154 [2020-07-21 11:14:13,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:14:13,690 INFO L225 Difference]: With dead ends: 299 [2020-07-21 11:14:13,690 INFO L226 Difference]: Without dead ends: 229 [2020-07-21 11:14:13,691 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 287 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2020-07-21 11:14:13,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-07-21 11:14:13,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 194. [2020-07-21 11:14:13,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-07-21 11:14:13,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 230 transitions. [2020-07-21 11:14:13,712 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 230 transitions. Word has length 154 [2020-07-21 11:14:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:14:13,713 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 230 transitions. [2020-07-21 11:14:13,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 11:14:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 230 transitions. [2020-07-21 11:14:13,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-21 11:14:13,715 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:14:13,716 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 11:14:13,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:13,922 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:14:13,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:14:13,923 INFO L82 PathProgramCache]: Analyzing trace with hash -547179998, now seen corresponding path program 1 times [2020-07-21 11:14:13,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:14:13,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126704967] [2020-07-21 11:14:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:14:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:14:14,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 792 conjuncts, 313 conjunts are in the unsatisfiable core [2020-07-21 11:14:14,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:14:14,285 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-07-21 11:14:14,286 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:14,312 INFO L624 ElimStorePlain]: treesize reduction 4, result has 86.7 percent of original size [2020-07-21 11:14:14,312 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:14:14,313 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:26 [2020-07-21 11:14:14,346 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-07-21 11:14:14,347 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:14,364 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:14:14,384 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2020-07-21 11:14:14,385 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:14,395 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:14:14,401 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2020-07-21 11:14:14,401 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:14,416 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:14:14,417 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 11:14:14,417 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 5 variables, input treesize:35, output treesize:13 [2020-07-21 11:14:15,282 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-07-21 11:14:15,311 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-07-21 11:14:15,312 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:15,367 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:14:15,376 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2020-07-21 11:14:15,376 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:15,437 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 11:14:15,455 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2020-07-21 11:14:15,457 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:15,606 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-07-21 11:14:15,607 INFO L624 ElimStorePlain]: treesize reduction 16, result has 84.6 percent of original size [2020-07-21 11:14:15,614 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2020-07-21 11:14:15,616 INFO L544 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-07-21 11:14:15,752 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 52 [2020-07-21 11:14:15,753 INFO L624 ElimStorePlain]: treesize reduction 16, result has 85.3 percent of original size [2020-07-21 11:14:15,762 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:14:15,765 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:14:15,767 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:14:15,773 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:14:15,776 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:14:15,782 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 11:14:15,784 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:14:15,786 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:14:15,787 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:14:15,788 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:14:15,793 INFO L544 ElimStorePlain]: Start of recursive call 1: 8 dim-0 vars, 2 dim-1 vars, 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-07-21 11:14:15,793 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 12 variables, input treesize:93, output treesize:27 [2020-07-21 11:14:17,605 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification that was a NOOP. DAG size: 23 [2020-07-21 11:14:19,094 WARN L193 SmtUtils]: Spent 1.42 s on a formula simplification that was a NOOP. DAG size: 26 [2020-07-21 11:14:20,307 WARN L193 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 31 [2020-07-21 11:14:58,505 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 11:15:40,676 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 36 [2020-07-21 11:15:48,823 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 11:16:10,425 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 11:17:04,699 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 11:18:03,004 WARN L193 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 11:18:26,570 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:18:55,119 WARN L193 SmtUtils]: Spent 4.40 s on a formula simplification that was a NOOP. DAG size: 176 [2020-07-21 11:18:55,124 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 11:21:11,772 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory") [2020-07-21 11:21:11,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126704967] [2020-07-21 11:21:11,774 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory") [2020-07-21 11:21:11,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:21:11,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-07-21 11:21:11,775 ERROR L206 FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible [2020-07-21 11:21:11,775 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:21:11,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:21:12,017 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-07-21 11:21:12,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:21:12 BoogieIcfgContainer [2020-07-21 11:21:12,018 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:21:12,023 INFO L168 Benchmark]: Toolchain (without parser) took 425907.28 ms. Allocated memory was 144.7 MB in the beginning and 367.5 MB in the end (delta: 222.8 MB). Free memory was 100.7 MB in the beginning and 246.6 MB in the end (delta: -145.9 MB). Peak memory consumption was 76.9 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:12,024 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-21 11:21:12,025 INFO L168 Benchmark]: CACSL2BoogieTranslator took 980.48 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 100.3 MB in the beginning and 163.8 MB in the end (delta: -63.5 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:12,026 INFO L168 Benchmark]: Boogie Preprocessor took 98.84 ms. Allocated memory is still 201.9 MB. Free memory was 163.8 MB in the beginning and 159.7 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:12,027 INFO L168 Benchmark]: RCFGBuilder took 1107.03 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 159.7 MB in the beginning and 203.0 MB in the end (delta: -43.3 MB). Peak memory consumption was 79.1 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:12,028 INFO L168 Benchmark]: TraceAbstraction took 423714.05 ms. Allocated memory was 233.8 MB in the beginning and 367.5 MB in the end (delta: 133.7 MB). Free memory was 201.5 MB in the beginning and 246.6 MB in the end (delta: -45.1 MB). Peak memory consumption was 88.6 MB. Max. memory is 7.1 GB. [2020-07-21 11:21:12,032 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 980.48 ms. Allocated memory was 144.7 MB in the beginning and 201.9 MB in the end (delta: 57.1 MB). Free memory was 100.3 MB in the beginning and 163.8 MB in the end (delta: -63.5 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 98.84 ms. Allocated memory is still 201.9 MB. Free memory was 163.8 MB in the beginning and 159.7 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1107.03 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 159.7 MB in the beginning and 203.0 MB in the end (delta: -43.3 MB). Peak memory consumption was 79.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 423714.05 ms. Allocated memory was 233.8 MB in the beginning and 367.5 MB in the end (delta: 133.7 MB). Free memory was 201.5 MB in the beginning and 246.6 MB in the end (delta: -45.1 MB). Peak memory consumption was 88.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 536]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L672] CALL, EXPR dll_create_master() [L630] CALL, EXPR dll_create_generic(dll_insert_master) [L577] void *dll = ((void *)0); [L578] CALL insert_fnc(&dll) [L620] CALL, EXPR alloc_or_die_master() [L558] struct master_item *ptr = malloc(sizeof(*ptr)); [L559] COND FALSE !(!ptr) [L561] ptr->next = ((void *)0) [L562] ptr->prev = ((void *)0) [L563] ptr->slave = ((void *)0) [L564] return ptr; [L620] RET, EXPR alloc_or_die_master() [L620] struct master_item *item = alloc_or_die_master(); [L621] EXPR \read(**dll) [L621] struct master_item *next = *dll; [L622] item->next = next [L623] COND TRUE \read(*next) [L624] next->prev = item [L625] CALL, EXPR dll_create_slave() [L586] CALL, EXPR dll_create_generic(dll_insert_slave) [L577] void *dll = ((void *)0); [L578] CALL insert_fnc(&dll) [L568] CALL, EXPR alloc_or_die_slave() [L544] struct slave_item *ptr = malloc(sizeof(*ptr)); [L545] COND FALSE !(!ptr) [L547] ptr->next = ((void *)0) [L548] ptr->next = ((void *)0) [L549] return ptr; [L568] RET, EXPR alloc_or_die_slave() [L568] struct slave_item *item = alloc_or_die_slave(); [L569] EXPR \read(**dll) [L569] struct slave_item *next = *dll; [L570] item->next = next [L571] COND FALSE !(\read(*next)) [L573] *dll = item [L578] RET insert_fnc(&dll) [L579] CALL insert_fnc(&dll) [L568] CALL, EXPR alloc_or_die_slave() [L544] struct slave_item *ptr = malloc(sizeof(*ptr)); [L545] COND FALSE !(!ptr) [L547] ptr->next = ((void *)0) [L548] ptr->next = ((void *)0) [L549] return ptr; [L568] RET, EXPR alloc_or_die_slave() [L568] struct slave_item *item = alloc_or_die_slave(); [L569] EXPR \read(**dll) [L569] struct slave_item *next = *dll; [L570] item->next = next [L571] COND FALSE !(\read(*next)) [L573] *dll = item [L579] RET insert_fnc(&dll) [L580] COND FALSE !(__VERIFIER_nondet_int()) [L582] EXPR \read(*dll) [L582] return dll; [L577] void *dll = ((void *)0); [L582] return dll; [L586] RET, EXPR dll_create_generic(dll_insert_slave) [L586] return dll_create_generic(dll_insert_slave); [L625] RET, EXPR dll_create_slave() [L625] item->slave = dll_create_slave() [L626] *dll = item [L578] RET insert_fnc(&dll) [L579] CALL insert_fnc(&dll) [L620] CALL, EXPR alloc_or_die_master() [L558] struct master_item *ptr = malloc(sizeof(*ptr)); [L559] COND FALSE !(!ptr) [L561] ptr->next = ((void *)0) [L562] ptr->prev = ((void *)0) [L563] ptr->slave = ((void *)0) [L564] return ptr; [L620] RET, EXPR alloc_or_die_master() [L620] struct master_item *item = alloc_or_die_master(); [L621] EXPR \read(**dll) [L621] struct master_item *next = *dll; [L622] item->next = next [L623] COND TRUE \read(*next) [L624] next->prev = item [L625] CALL, EXPR dll_create_slave() [L586] CALL, EXPR dll_create_generic(dll_insert_slave) [L577] void *dll = ((void *)0); [L578] CALL insert_fnc(&dll) [L568] CALL, EXPR alloc_or_die_slave() [L544] struct slave_item *ptr = malloc(sizeof(*ptr)); [L545] COND FALSE !(!ptr) [L547] ptr->next = ((void *)0) [L548] ptr->next = ((void *)0) [L549] return ptr; [L568] RET, EXPR alloc_or_die_slave() [L568] struct slave_item *item = alloc_or_die_slave(); [L569] EXPR \read(**dll) [L569] struct slave_item *next = *dll; [L570] item->next = next [L571] COND FALSE !(\read(*next)) [L573] *dll = item [L578] RET insert_fnc(&dll) [L579] CALL insert_fnc(&dll) [L568] CALL, EXPR alloc_or_die_slave() [L544] struct slave_item *ptr = malloc(sizeof(*ptr)); [L545] COND FALSE !(!ptr) [L547] ptr->next = ((void *)0) [L548] ptr->next = ((void *)0) [L549] return ptr; [L568] RET, EXPR alloc_or_die_slave() [L568] struct slave_item *item = alloc_or_die_slave(); [L569] EXPR \read(**dll) [L569] struct slave_item *next = *dll; [L570] item->next = next [L571] COND FALSE !(\read(*next)) [L573] *dll = item [L579] RET insert_fnc(&dll) [L580] COND FALSE !(__VERIFIER_nondet_int()) [L582] EXPR \read(*dll) [L582] return dll; [L577] void *dll = ((void *)0); [L582] return dll; [L586] RET, EXPR dll_create_generic(dll_insert_slave) [L586] return dll_create_generic(dll_insert_slave); [L625] RET, EXPR dll_create_slave() [L625] item->slave = dll_create_slave() [L626] *dll = item [L579] RET insert_fnc(&dll) [L580] COND FALSE !(__VERIFIER_nondet_int()) [L582] EXPR \read(*dll) [L582] return dll; [L577] void *dll = ((void *)0); [L582] return dll; [L630] RET, EXPR dll_create_generic(dll_insert_master) [L630] return dll_create_generic(dll_insert_master); [L672] RET, EXPR dll_create_master() [L672] struct master_item *dll = dll_create_master(); [L673] CALL inspect_full(dll) [L645] CALL inspect_base(dll) [L634] COND FALSE !(!(dll)) [L635] EXPR dll->next [L635] COND TRUE !(dll->next) [L635] CALL fail() [L536] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 22 procedures, 175 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 423.6s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 556 SDtfs, 154 SDslu, 3865 SDs, 0 SdLazy, 690 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 492 GetRequests, 458 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=194occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 35 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 273 NumberOfCodeBlocks, 273 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 482 ConstructedInterpolants, 0 QuantifiedInterpolants, 113085 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1387 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 401/411 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...